Cylinder lock



Nov. 18, 1930. F, K HEYER 1 ,782,347

CYLINDER LOCK I Filed Oct. 13, 1926 Patented Nov. 18, 1930 FRED-ERIC 1r HEYER; or STAMFORD, CONNECTICUT, AssIGnon'ro THE YALE Gt Towns MANUFACTURING COMPANY, or STAMFORD, CONNECTICUT CYLINDER LOCK I Application filed October 13, 1926.- Serial No. 141,302:

This invention relates to improvements in cylinder locks and more particularly to the.

plug structure. I r In accordance with the present methodof making plugs for cylinder locks, the plug has usually been made in one complete die cast unit It has been found that on account of the necessarymachining, the sectional area is so reduced that the plug is structually weak and unequal of itself to withstand the strain of the operation of the bolt under certain conditions; An object of my present invention is to w reinforce the core 'of-the plug st'ruct'ure so that it will effectually withstand any strain to which itinay-be subjected,-when in use, and sothat the plug case shall be reinforced 'in such manner that in the event that it becomes broken by violence or attack, the struc- 26 ture will still be heldin operative position for the key; j I

A further object is to providethe core of a plug structure, with a reinforcing jacket which shall be so connected therewith that it will always turn with said core and so that the said jacket willcarry all the strain incident to operation of the lock, thus retaining the economical method of forming the tumbler, spring and key openings in the plug by means of die casting or otherwise and also obtaining the required strength and rigidity necessary for the proper operation of the lock.

Vfith this and other'objects in view, the invention consistsin certain novel structure as hereinafter set forth and pointed out in the claims.

In the accompanying drawings; a

Figure 1 is an enlarged longitudinal sectional view showing an embodiment of my invention;

Figure 2 is a rear end View;

Figure 3 is an end view (on a smaller scale) of the lock cylinder;

Figure 1 is an end View of the plug jacket member; a i r Figure 5 is an end view of the plug core, and 1 Figures 6 and 7 are faceviews showing respective sides of the locking platewhich carries a roll-back pin. Y

In the drawings, the cylinder of the lock is shown at 1 and provided with grooves 2 ,which receive, tumblers carried by the plug structure of-the lock as will be readily understood. 1

The plug structure comprises a core -mem-- her 3, (preferably of thedic-casttype) hav ingakey-fway 4' and suitable slots 5 to receive spring-pressed tumblers (not shown), and a reinforcing jacket 6, preferably of wrought metal and having tumbler slots or openings 7. Therrein forcing jacket 6 closely surrounds the core member 3 and atone end is pro videdwith a flanged head 8 which may be made as an integral part of the jacket and. slot 9. A portion,

is provided with a key ofa key is shown'at 10. r p

a At 'its rear end,-the jacket 6 is provided with a plurality of lugs llfwhich project through openings 12 in a locking plate 13 and are upsetfagainst the rear face of said .plate' as shown in Figure 1. i The plate 13 is made -withla central angularopening 14 which receives a similarly shaped enlargement or projection 1 1 on. the rear end of the-plugcore. It will be apparent that the connection ofthe jacket with the plate 13 and the vcoimection of the plug core with said-plate, the jacket will be so secured to the core gthat these parts willalwaysturn together and the jacketwill sustain all strains to which the plug structure may be subjected during operation of the lock, thereby most effectually relieving the die cast core ofsuch strainsand protectingthe same from .breakage orjinjury to which the core might be subjected not reinforced. Y

Theplate 13 constitutes a locking member between; the reinforcing jacket. andthe core of the plug' structure, and it also provides ai'carrier for a roll-back pin. 15. This pin ismade with a shank which passes through the-plate and is upset, the enlargements 16.

thus formed on theinner face of the plate entering aligning notches 17 18in the plug a core 8 and jacket 6' respectively, thus 7 assisting in preventing relative turning movement of said core and jacket.

The cylinder 1 is provided at its rear end with a recess 19 forming stop shoulders 20 and the plate 13 is provided with lugs 21 which enter the recess 19 and are cooperable with the stop shoulders 20 to limit the turn- .ing movement of the plug structure of the lock.

Having fully described my invention what I claim as new and desire to secure by Letters- Patent, 'is 1 1. A plug structure for a cylinder lock,

.end, and a plate having connection with the core member and provided with openings re- -'ceiving the lugs on the jacket.

' plugstructure for a cylinder lock, comprising a core having a projection at "one end, reinforcing jacket for saidcorememher, said jacket having projections at 'one end, and a plat-ehavingopennrgs receiving the projections on the jacket, said lugs bei'ng upset, a nd said plate having an openingrece'iv'ing the projection on the core member.

4. A plug structure for a-cylinde'r look,

comprising a core member, a -:reinforcing jacket for the same, said jacket having an integral flanged head at one end and v projec- *tions at the other end, and a plate av ing openings receiving theprojections on the jacket, and meansconnecting said plate with the core'member; v

,5. In a cylinder lock,-the,combi nation with a lock cylinder, ofa plug core, a reinforcing acket for said core, said core and jacket 1 giving aligning recesses, a pl'a te secured to 1 jacket-and conne'cted wi th the core member, a pin s'eciired to said plate and having [an upset portion at its inner e'nd entering saidaligning recesses in the core m'ember and jacket. v

6. In a cylinder lock, the combination with a lock cylinder having stop shoulders atone e'nd,'of-a plug core, a reinforcing jacket therefor,a plate secured to said jacket and-having connection with said core, stop means on i said plate cooperable with the stop shoulders *on'the cylinder, anda-roll-back pincarried by said ,plate and "havi'ng'a part interlocking with the core andhjacket.

- 7. A plug, structure for a cylinder 'lock,

comprisingafc'ore membe'r and a reinforcing jacket therefor, said reinforcingj acket being independent of said core member, a cam 'member, a means for fmdependently securingsaid jacket and said core member to' said cam member.

8. A plug structure for a cylinder lock, comprising a core member of the sliding tumbler type, a IGlIlfOlClDgjjELCkQt for the core member extending from end to end of said member and rotatable therewith, said jacketbeing independent of said core memher, a cam member, and means 'forindependently securing said jacket and said core member to said cam member. 7 v

9. A plug structure for a cylinder lock, comprising a cast core member, a wrought reinforcing jacket therefor and rotatable therewith, said jacket being independent of said core member, a cam member, means for securing the core member to said cam member, and other means for independently se curing said acket to said cam member.

' 10. A plugstructure for a cylinderlock,

*comprising a core member and a reinforcing jacket, said jacket being independent of said core member, a cam member, and means for independently securing said acket and said core member to the cam member, whereby 631d parts may move as a unit.

11. A plug structure -for a cylinder lock,

t. comprising a cast'core member and a wrought metal reinforcing jacket surrounding the same,sa1d acket being independent of said core member, acam member, means for securing the core member to the cam member,

and independent means for securing said jacket member to said cam member.

12. A plug structure for a cylinder lock, including a die'cast core member, an inclependent reinforcing jacket therefor and movable therewith, a cam member, and means rigidly securing-said jacket to said cam member.

In testimony whereof, I have signed this specification.

FBEDERIC K. HEYER. 

